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美国密歇根大学医学院史蒂芬尼·布朗教授主持了一项长达7年的研究,得出的最终结论是,相对于没有家庭负担的老人,那些与身体残疾或者重病的
Professor Stevenney Brown of the University of Michigan Medical School in the United States presided over a seven-year study that led to the conclusion that compared with the elderly who do not have a family burden, those who are physically disabled or seriously ill